- Watermaker Technical
What size generator do I need?
Our smallest system which produces 300 gallons per day uses a ¾ hp electric motor for the high pressure pump that can be run on generators as small as 2000 watts or even an inverter. Systems to 800 gallons per day operate at approximately 1500 watts and require a 4.5 KW to effectively start the system.
What is reverse osmosis?
Reverse osmosis is the actual process that is used to produce the fresh water from the sea. The membranes only allow fresh water (product water or permeate) to pass through the material at 800 psi and almost all of the salt and other minerals are excluded and sent back to the sea as brine or concentrate.
Where does the salt go?
The salt does not stay in the membrane and is constantly flushed back to the sea in a cross flow self-cleaning process.
How much noise do the systems make?
Our systems are designed to be as quiet as possible; vibration isolation mounts are used to greatly reduce any noise that is generated by the high pressure pump and all components are securely mounted during the installation process which eliminates equipment chatter. Actual ambient noise would be comparable to a clothes dryer.
Can you drink the water?
Reverse osmosis product water is some of the best tasting, healthy water you can drink as it contains the same mineral balance as the sea and a person’s own blood. Most of our customers find that they have no need to buy and store bottled water once their watermaker is installed, not only does this same money and space, it is better for the environment.
Can I install the system myself?
Yes, we build the individual system components to be easy and straight forward to install. An installation kit is provided with each system and all motors and controls are pre-wired and well labeled which makes owner installation a snap.
Can I use the system in a marina?
We do not recommend operating systems where there is the chance of fuel or oil spills or where cleaning chemicals and other contaminants may be present. In general, if you would not swim in water, do not use it to make water.
Why should I buy a Sea-R.O. system?
Sea-R.O. watermakers offers the best equipment at the best value.
Our systems are comprised of high quality components selected from the best manufacturers, each component has been proven in hundreds of hours of testing before it is ever used in our designs.
These components are also industry standard which means that they are available worldwide and at a much lower price than any proprietary “odd ball” filters, membranes, pumps, etc. that may be used by other manufacturers.
Because of this, we can honestly say that our equipment is the best product for your dollar and will cost you much less to operate due to both energy efficiency and replacement parts cost.
What spare parts should be on hand?
We have compiled an annual spares and consumable kit that is available for each of our systems which we highly recommend you purchase at the same time as the equipment. This kit includes spare filters, pump oil, pump rebuild parts, o-rings and seals.
How much maintenance is required?
Maintenance of our systems is comprised of replacing filters as needed and changing the oil in the high pressure pump after the first 50 hours for break in, then every 500 hours thereafter. Pump rebuilding is a simple in field procedure and the parts required are included in our annual spares and consumables kit.
How long do the membranes last?
The reverse osmosis membrane elements work by allowing only fresh water to pass through and 99.8% of the salt and other minerals are sent back to the sea. Since we do not accumulate these ions, the membranes will typically last 5 years or longer. Our systems include fresh water flush systems to provide a simple and effective method of maintenance which further extends the membrane life.
How long do the filters last?
Prefilter life is dependent on the feed water conditions. We recommend that marine systems be operated in open ocean conditions and when this is done, filters typically last a month or longer. Coastal areas with higher levels of sediments, algae, and plankton will see a reduction in filter life and we do recommend larger filter cartridges for systems operated in this environment. We use only 100% polypropylene filters in our systems which allows the filters to be washed down and reused. For land based systems, the best feed water source is from a dug or drilled well which makes use of the earth as a prefilter which provides a very effective reduction of the turbidity.
How many gallons of water do I need to produce per day?
This will vary depending on the application and we will be glad to review your specific use and help select the best system for your application. Typically, most boat systems are sized to provide 10-20 gallons per person, per day and land based systems are sized to provide 100 gallons per person, per day. People are generally surprised by the amount of water needed for land based systems, and yet our data has been verified by the numerous studies/installations that we have done on island homes and resorts. When you total the quantity used for showers, sanitary needs, food prep, dishwashing, consumption, laundry and a minimal amount for irrigation you will see that this amount is accurate.